Grinding and polishing machine.



W. F-"MILLERQ I GRINDING AND POLISHING-MACHINE. APPLIOA'TION FILED nov. 20. 19 11.

Patented May 7, 1 912 2 SHEETS-SHEET 1.

WITNESSES INVENTOR W Fa MILLER. GRINDING AND POLISHING MACHINE. APPLIOATION FILED H0120, 1911.

1,025,5117. Patented may 7, 1912 2 SHEETS-453E331 2.

"'1 WITNESSES I IN VE 1VT OR Q fWm,

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e having a lol'lgltmlinally (hthe me, sleeve being inne :1 .QW l? which smi'ew jomine l in lhe "p the said shalt projecting};

'65 l l elm" l 9 heyeml one end. The shaft 7 155 J m wiiatahle leosely J i Q 3} en .m H1 1101 ploucec u clutch 91 which Iney be thrown into lent; with the wheel 19 01- 2O alter-- the said clul'ch and Wheels being ii with any suitable type of clutch v s adapted lio'engege for the purpose m'wi'licating the motion of the Wheels the shaft, the saicl clutch members being .own as projeciions 22 and 23 respec- 1 v on the clutch member and the Wheels, (006%. that the Sam clutch )lined en the B] t 18 so that motion 0i eiher "pulley cmmnuniculied to "he elaleh memhei' will serve to rotate the vial shaft As shown in 1, the pulleys 46 are eenneeced with bolts 24: uncl 25 Lhe letter of which is (messed 3g at it may 611w the pulley 20 in .71 opposite to the direction of rotathe pulley 19 when the said belts gm rem a, shaft- 26 common to both lit shewn in the drawing that 5 fi'iwhese large pulley '27 which is e a. pulley 28 on the shaft 29-, the said emaining a drum pulley 30 for he hell: 3]. (0 permit the said hel leugil-iidlnally of the said drum Fewer communicated to the seva'fls in any appropriate way, but as U1" (letuils of construction for accomplishm the invenlihn oplied u iji m an enlgglgfgu d t il l'ng; 'ihe Tesull immaterial, they Merlot and m ele'v here shown. 4

mwlng z'n'em ilhe huzfelor grinding Wheel 32 is asso- 3 illustrz LW sectional haw on Lll? hm ei i'ed with and ynfe'femhly mounted on a u law l vhieh collar has an integral guard he i. tending partially ovel" lhe periphery mil 7 01 the grinding wheel for the purpose of means {OL' proieetien. A fmgi'l'lem of the said guard 113012111 1911; but hmy ef cours he removed on we side to -Jil I hut. one PGYDM'L access to the grinding smr'fuee 0f the sales-111g l, il being; gvheel. The ee'ley encl uhe Wheel anal the 55 that lhe .lnnen'h 111a be up g? "us n soele ed therewith are cennected to nmhine M lied with hem-lin 's any, epprepz-ieke way so that they steppezrhng the parts of eh; re'getehle on.the sleeve 15 ancl mm H flange hub 88 which is whereby the said ,v i 'ed ceha'lnuously in 7.10 hi. 3 'ee-rmlhhed me-travel of eleeve @Wmg; to the travel atl'orded the belt 31 and the movementcommunicated to the buffer wheel by reason of its being connected through the medium of the nut 34, which .is attached to it, with the screw rotatable within the sleeve 15.

As the shaft 18 having the screw thereom may be rotated in opposite directions through the belts and pulleys heretofore described, it follows that when the said shaft is rotated in one direction, the grindin wheel will travel under the influence of the screw longitudinally of the sleeve in a certain direction whereas when the clutch is moved out of engagement with the pulley into engagement with the other pulley, the direction of rotation of the shaft 18 is changed so that the screw will move the grinding wheel on the sleeve in an opposite direction to that which it first traveled.

As a means for automatically shifting the direction of rotation of the screw, an automatically controlled clutch actuating mechanism is provided which will disengage from one wheel and cause it to engage the other Wheel and vice versa. To the end just mentioned, the shaft 18 is provided with a pinion 35 meshing with apinion 36 on a short shaft 37, the said shaft 37 being journaled in a yoke 38 which is suitably supported as shown. The yoke isprovided with lugs 38 apertured to receive thethrust rod 39 in order to permit.reciprocating movement of the said thrust rod. The yoke i? further provided with journal bearings 40 in which 'ascrew 41 is rotatably mounted and driven by means of the pinion 86. A forked arm l 41 is attached to the thrust rod and partially embraces the clutch 21 by lying in a groove 42 in said clutch 21 so that movement of the thrust rod is communicated to the clutch member by reason of this connection. A

traveling nut 43 is threaded on the screw and has an extension 44 apertured to receive the straight portion 45 of the yoke whereby it is guided. The thrust rod 39 has adjustable collars 46 secured to it, the said collars being spaced apart a distance approximately equal to that which it is intended the buffer wheels shall travel on the sleeve, the said collars 46 being in the path of travel of the nut. 43 or the extension 44 in order that the said nut or extension will engage one or the other of said collars and communicate motion to the thrust rod and thht the arm on the thrust rod may in turn communicate motion to the clutch because, of its engagement and disengagement of the pulleys heretofore described for the purpose of shifting the direction of rotation of the screw. As the collars are adjustable on the thrust rods by means of the screws 47 it follows that the operator will be able to control the distance of travel of the grinding wheel by s11nply limiting the distance of travel of the nut 43 with relation to the screw which it engages. The construction of the grinding wheel or buffer is well shown in Fig. 2.

In the operation of this grinding device and particularly of the means for shifting the same, itwill be observed that the pinions 35 and 36 will continuously rotate the screw so long as the power is applied to the machine, the direction of rotation shifting as the direction of rotation of the shaft 15 is shifted under the influence of the clutch and the parts heretofore described for shifting the said clutch.

1. In a grinding machine, a frame, a sleeve supported by said frame, a shaft carrying a grinding wheel rotatable in said sleeve,

means for rotating said shaft, oppositely rotating pulleys loosely mounted on said shaft, and a clutch mounted between said pulleys, a yoke having bearings supported by said sleeve, a thrust-rod slidable .in said bearings, said thrust-rod having spaced collars fixed thereto, a forked arm having one end thereof fixed to said thrust-rod between said spaced collars, and the opposite end thereof adapted to engage the said clutch member for operating the same, a screw-threaded shaft mounted on said yoke, a nut threaded to travel on said shaft, said nut adapted to engage the said collars on the thrust-rod for communicating motion thereto.

2. In a grinding machine, a frame, a sleeve supported by said frame, a shaft rotatable within said sleeve, a grinding wheel rotated by said shaft, pulleys loosely mounted on said shaft, a clutch memberunounted between said pulleys, a yoke supported by said sleeve, and a thrust rod carried by the yoke, means operated by said thrust rod for alternately throwing the clutch into engagement withthe ulleys, a gear wheel on one end of said sha t, and a gear wheel on said thrust rod adapted to mesh with the aforesaid gear wheel, for giving movement thereto.

In testimony whereof, I affix my signature in the presence of two Witnesses.

Witnesses i E. P. Wonrmnc,

VVAL'rEmE. 'TAoK. 

